SPEED MODE BELOW FL100 (A320)

[marsattacks]

Good morning,

another quite operational airbus question- Is there any recomandation which states only to use V/S below a certain altitude during approach?

I'm not talking about general airmanship- not to descent rapidly in ground proximity, but if you got any reference for the use of V/S (instead of OPN DES).



Thanks in advance,
MA